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Well I just measuered a fresh 25mm vittoria rally on a narrow rimmed ambrosio disc and it came out between 25.1 and 25.5mm from edge of rim to top of tyre at 130 PSI.
VS a 23c hardshell on a 23mm rim at 22.76 most of the way round at 75PSI.
Maybe this will give you some idea?
IR-
Might be ghosts in my head, but doesn't the diameter from rim edge to rim edge come out a couple of mm shorter on tubular rim, than on clincher rim.
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Thanks for that. That's pretty much what I thought would be the case. I'll probably go for a 23mm Corsa SC to start with and see how I get on with that. Cheers
Thuekr
roboto
Cheers Indra. It might be a pain to arrange a try out though. I don't get a lot of free time to go cross city these days for such things. You reckon you could somehow measure tyre height when it's pumped up.
If I remember correctly. The 23mm clincher did chip some paint off the crown when it picked up bits of road debris. I might just settle for a 23mm tub.